Electric fan



FIG. 1 is a front view of the electric fan;

FIG. 2 is a right side view of the fan;

FIG. 3 is a left side view of the fan;

FIG. 4 is a rear view of the fan;

FIG. 5 is a top view of the fan; and,

FIG. 6 is a bottom view of the fan. 

The ornamental design for an electric fan, as shown and described. 